A belt conveyor tear detection device and method

Abstract

The application relates to the technical field of belt conveyors, and discloses a belt conveyor tearing detection device and method, which comprises a belt conveyor, a first detection mechanism and a second detection mechanism are arranged on the belt conveyor, the first detection mechanism comprises a first fixing frame, a plurality of supporting components are arranged on the first fixing frame, and a pressure sensor is correspondingly arranged at the bottom of each supporting component; the second detection mechanism comprises a second fixing frame, an optical sensor is arranged on the inner side of the second fixing frame, the optical sensor comprises an emitter and a receiver, the pressure sensor is electrically connected with the emitter, a reciprocating driving component is connected to the emitter and the receiver, and a reflecting plate is arranged in the belt conveyor; a detection circuit is arranged on the outer side of the receiver, the detection circuit is connected with the receiver and a controller at two ends respectively, and the controller is electrically connected with the pressure sensor and a control circuit of the belt conveyor. The application has the advantages of low cost, simple structure, convenient installation and construction, timely detection and alarm for belt surface tearing, and prevention of accident expansion.

Description

Technical Field

[0001] This invention relates to the field of conveyor belt technology, and in particular to a tear detection device and method for conveyor belts. Background Technology

[0002] Belt conveyors, also known as belt conveyors, are widely used in various industries such as home appliances, electronics, electrical appliances, machinery, tobacco, injection molding, post and telecommunications, printing, and food for the assembly, testing, debugging, packaging, and transportation of objects. During operation, belt tearing is the most serious accident of belt conveyors, which will directly lead to the failure of the belt conveyor system, affect safe production, and even cause personal injury accidents.

[0003] The existing application publication number CN217755509U discloses a tape tear detection device for a tape conveyor. The key technical point is that it is installed on and fixed to support plates on both sides of the tape, corresponding to the upper layer of the tape. The detection device also includes a first detection mechanism; the first detection mechanism includes a fixed frame fixed to the support plate; a rotating rod rotatably connected to the fixed frame and rotating around a horizontal axis; a counterweight fixedly connected to one end of the rotating rod and supported on the top of the upper layer of the tape; a contact sensor, the end of the rotating rod away from the counterweight rotating upwards to contact the contact sensor; and a controller connected to the contact sensor and to the conveyor's switch.

[0004] However, this solution still has shortcomings: 1. Fixed-point monitoring via receiver and transmitter cannot accurately identify the corresponding tear location, requiring manual search, which is inefficient; 2. At the same time, detection and control are achieved by rotating the counterweight, but the lifting angle of the counterweight cannot be guaranteed due to the different tear sizes, making accurate identification impossible; 3. The lack of necessary cleaning components will introduce certain errors in subsequent detection.

[0005] Therefore, those skilled in the art urgently need to develop a tear detection device and method for conveyor belts. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art by proposing a tear detection device and method for conveyor belts.

[0007] Based on an objective of this invention, the following technical solution is proposed: a tear detection device for a conveyor belt, comprising a conveyor belt machine, wherein a first detection mechanism is provided between the upward conveyor belt and the return conveyor belt of the conveyor belt machine, the first detection mechanism comprising a first fixed frame, wherein a plurality of support components are provided on the first fixed frame, and pressure sensors are respectively provided at the bottom of the plurality of support components; a second detection mechanism is provided above the conveyor belt machine, the second detection mechanism comprising a second fixed frame, wherein a photoelectric sensor is provided on the inner side of the second fixed frame, the photoelectric sensor comprising a transmitter and a receiver, the pressure sensor being electrically connected to the transmitter, and a reciprocating drive component being connected to the transmitter and the receiver; a reflector is provided inside the conveyor belt machine; a detection circuit is provided on the outer side of the receiver, wherein the two ends of the detection circuit are respectively connected to the receiver and a controller, and the controller is respectively electrically connected to the pressure sensor and the control circuit of the conveyor belt machine.

[0008] Preferably, the support assembly includes a support rod that is slidably connected through the first fixed frame, a pulley bracket is provided at the top of the support rod, a pulley is rotatably provided above the pulley bracket, and a support rod base is provided at the bottom of the support rod.

[0009] Preferably, a spring is provided between the support rod base and the pressure sensor, and a guide post and a guide sleeve are sleeved inside the spring. One end of the guide post extends into the inside of the guide sleeve, and the guide post and the guide sleeve are slidably connected. The bottom of the pressure sensor is connected to a first fixing bracket plate.

[0010] Preferably, the left end of the tape machine is provided with a cleaning mechanism, which includes a scraper, and a collection box is provided on the left side of the scraper.

[0011] Preferably, the reciprocating drive assembly includes a lead screw rotatably connected to the inner wall of the second fixed frame, a lead screw sleeve fitted on the lead screw, the bottom of the lead screw sleeve being connected to the transmitter and receiver, one end of the lead screw extending outside the second fixed frame and connected to a servo motor, the servo motor being fixedly connected to the second fixed frame, a guide rod slidably connected to the lead screw sleeve above the lead screw, a second fixed frame support plate connected to the bottom of the reflector, and the servo motor being electrically connected to the controller.

[0012] Preferably, an alarm is provided on the top of the second mounting bracket, and the alarm is electrically connected to the controller.

[0013] Based on another objective of the present invention, a method for detecting tape tear using the above-mentioned tape conveyor tear detection device is proposed, comprising the following steps: S1. When the pressure sensor is subjected to pressure, it transmits a signal to the transmitter and controller. S2. After receiving the signal from the pressure sensor, the controller starts the servo motor, which drives the lead screw sleeve to move along the lead screw. As the lead screw sleeve moves, it also drives the transmitter and receiver to move together. Finally, it stops when it moves to the same distance from the side of the conveyor belt as the corresponding pressure sensor. S3. When the beam emitted by the transmitter is reflected by the reflector, the receiver receives the signal from the transmitter and transmits the signal to the detection circuit and the controller in sequence. S4. After receiving the signal from the detection circuit, the controller stops the tape machine and activates the alarm. The location of the tape machine below the lead screw sleeve is the tear point.

[0014] Preferably, in S1, there are multiple pressure sensors, and the pressure sensors at different locations transmit different control signals to the controller.

[0015] Preferably, in S2, different control signals will cause the servo motor to rotate different numbers of revolutions, thereby controlling the movement distance of the lead screw sleeve.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses a first detection mechanism to initially detect and locate the tear position of the tape machine. After finding the corresponding position, a second detection mechanism further detects and locates it. This invention is low in cost, simple in structure, and easy to install and construct. It can promptly detect and alarm on the surface tear of the tape, preventing the accident from escalating.

[0017] 2. The present invention cleans the dirt on the surface of the tape machine through a cleaning mechanism, so as to avoid the dirt on the surface of the tape machine from affecting the subsequent tear detection and to ensure the normal operation of the photoelectric sensor inside the second detection mechanism.

[0018] 3. The first fixed bracket plate of the present invention is used to support the pressure sensor, while the guide post and guide sleeve restrict the direction of movement of the support rod, ensuring that the pressure sensor is only subjected to pressure from directly above, thereby improving the detection accuracy. The spring supports the pulley through the support rod.

[0019] 4. In this invention, there are multiple pressure sensors. Pressure sensors at different positions transmit different control signals to the controller, thereby distinguishing the tearing conditions at different locations of the tape machine. Different control signals will cause the servo motor to rotate at different numbers of revolutions, thereby controlling the movement distance of the lead screw sleeve, transmitter, and receiver, ensuring accurate positioning of the tear location. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a front sectional view of the first detection mechanism of the present invention; Figure 3 This is a front sectional view of the second detection mechanism of the present invention; Figure 4 This is a schematic diagram of the connection relationship of the controller described in this invention.

[0021] In the diagram: 1- Tape machine; 2- First detection mechanism; 21- First fixed frame; 211- First fixed frame support plate; 22- Support rod; 23- Pulley bracket; 24- Pulley; 25- Support rod base; 26- Pressure sensor; 27- Spring; 28- Guide column; 29- Guide sleeve; 3- Cleaning mechanism; 31- Scraper; 32- Collection box; 4- Second detection mechanism; 41- Second fixed frame; 411- Second fixed frame support plate; 42- Lead screw; 43- Guide rod; 44- Lead screw sleeve; 45- Transmitter; 46- Receiver; 47- Servo motor; 48- Alarm; 49- Reflector; 5- Detection circuit; 6- Controller. Detailed Implementation

[0022] The present invention will now be clearly described with reference to the accompanying drawings and specific embodiments. This description is merely illustrative and is not intended to limit the scope of the invention. Any modifications, equivalent substitutions, or improvements made by those skilled in the art based on the embodiments of the present invention without inventive effort to obtain all other embodiments should be included within the scope of protection of the present invention.

[0023] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] Example 1 Please see Figures 1-4This invention provides a tear detection device for a conveyor belt, comprising a conveyor belt machine 1, a first detection mechanism 2 between the upward and return conveyor belts of the conveyor belt machine 1, the first detection mechanism 2 including a first fixing frame 21, a plurality of support components on the first fixing frame 21, and pressure sensors 26 respectively disposed at the bottom of the plurality of support components; a second detection mechanism 4 is disposed above the conveyor belt machine 1, the second detection mechanism 4 including a second fixing frame 41, a photoelectric sensor disposed on the inner side of the second fixing frame 41, the photoelectric sensor including a transmitter 45 and a receiver 46, and pressure... Sensor 26 is electrically connected to transmitter 45. Reciprocating drive components are connected to transmitter 45 and receiver 46. A reflector 49 is provided inside the conveyor belt 1. This device uses a Panasonic CX-481 photoelectric sensor and a Panasonic RF-230 reflector. A detection circuit 5 is provided on the outside of receiver 46. The two ends of detection circuit 5 are connected to receiver 46 and controller 6 respectively. Controller 6 is electrically connected to pressure sensor 26 and control circuit of conveyor belt 1 respectively. An alarm 48 is provided on the top of the second fixing frame 41. The alarm 48 is electrically connected to controller 6.

[0026] In this embodiment, specifically: the reciprocating drive assembly includes a lead screw 42 rotatably connected to the inner wall of the second fixed frame 41, a lead screw sleeve 44 sleeved on the lead screw 42, the bottom of the lead screw sleeve 44 connected to the transmitter 45 and the receiver 46, one end of the lead screw 42 extending outside the second fixed frame 41 and connected to a servo motor 47, the servo motor 47 being fixedly connected to the second fixed frame 41, a guide rod 43 slidably connected to the lead screw sleeve 44 above the lead screw 42, a second fixed frame support plate 411 connected to the bottom of the reflector plate 49, and the servo motor 47 being electrically connected to the controller 6. The controller 6 controls the servo motor 47 to rotate, which in turn drives the lead screw 42 to rotate. The lead screw sleeve 44 on the lead screw 42 causes the transmitter 45 and receiver 46 to move together along the lead screw 42. The beam emitted by the transmitter 45 passes through the tear hole and is reflected by the reflector 49. The receiver 46 receives the signal from the transmitter 45 and transmits the signal to the detection circuit 5 and the controller 6 in sequence. The controller 6 controls the tape machine 1 to stop running and activates the alarm 48. The position of the tape machine 1 below the lead screw sleeve 44 is the tear point.

[0027] Example 2 Based on Embodiment 1, in order to improve detection accuracy, the support assembly includes a support rod 22 that is slidably connected to the first fixed frame 21, a pulley bracket 23 is provided at the top of the support rod 22, a pulley 24 is rotatably provided above the pulley bracket 23, and a support rod base 25 is provided at the bottom of the support rod 22.

[0028] In this embodiment, specifically: a spring 27 is provided between the support rod base 25 and the pressure sensor 26. A guide post 28 and a guide sleeve 29 are fitted inside the spring 27. One end of the guide post 28 extends into the guide sleeve 29, and the guide post 28 and guide sleeve 29 are slidably connected. A first fixed bracket plate 211 is connected to the bottom of the pressure sensor 26. Initially, the pulley 24 is not under pressure. When pressure is applied above the pulley 24, the pressure is transmitted to the pressure sensor 26 through the support rod 22 and the support rod base 25. The first fixed bracket plate 211 supports the pressure sensor 26, while the guide post 28 and guide sleeve 29 restrict the direction of movement of the support rod 22, ensuring that the pressure sensor 26 is only subjected to pressure from directly above, thus improving detection accuracy. The spring 27 supports the pulley 24 through the support rod 22.

[0029] Example 3 Based on Embodiment 2, in order to improve the accuracy of tear detection, a cleaning mechanism 3 is provided at the left end of the tape machine 1. The cleaning mechanism 3 is located between the first detection mechanism 2 and the second detection mechanism 4. The cleaning mechanism 3 includes a scraper 31, and a collection box 32 is provided on the left side of the scraper 31.

[0030] The scraper 31 uses a commonly used scraper. One side of the scraper is connected to the outer tape of the conveyor belt. The scraper 31 cleans the surface of the conveyor belt 1 to prevent dirt on the surface of the conveyor belt 1 from affecting the subsequent tear detection. This ensures the normal operation of the photoelectric sensor inside the second detection mechanism 4 and the normal transmission between the receiver 46 and the transmitter 45.

[0031] Example 4 The present invention also provides a method for detecting tear in a conveyor belt, including the conveyor belt tear detection device in the above embodiments, and further including the following steps: S1. When pressure is applied, pressure sensor 26 transmits a signal to transmitter 45 and controller 6. S2. After receiving the signal from the pressure sensor 26, the controller 6 starts the servo motor 47, which drives the lead screw sleeve 44 to move along the lead screw 42. As the lead screw sleeve 44 moves, it also drives the transmitter 45 and the receiver 46 to move together. Finally, it stops when it moves to the same distance from the side of the belt conveyor 1 as the corresponding pressure sensor 26. S3. When the beam emitted by the transmitter 45 is reflected by the reflector 49, the receiver 46 receives the signal from the transmitter 45 and transmits the signal to the detection circuit 5 and the controller 6 in sequence. After receiving the signal from the detection circuit 5, the controller 6 controls the tape machine 1 to stop running and activates the alarm 48. The position of the tape machine 1 below the screw sleeve 44 is the tear point.

[0032] In this embodiment, specifically: in S1, there are multiple pressure sensors 26, and the pressure sensors 26 at different locations transmit different control signals to the controller 6. By using different control signals, the corresponding pressure sensor 26 is identified, thereby locating the position of the corresponding tear.

[0033] In this embodiment, specifically: in S2, different control signals will cause the servo motor 47 to rotate different numbers of revolutions, thereby controlling the moving distance of the lead screw sleeve 44. Based on the control of the servo motor 47, it is ensured that the final moving distance of the lead screw sleeve 44 is equal to the distance between the corresponding pressure sensor 26 and the side of the tape machine 1, accurately identifying the tear position, and then performing photoelectric sensing on the corresponding position of the tape machine 1.

[0034] Working principle of this invention: When a tear occurs on the surface of the tape machine 1, the bottom of an object on the tape machine 1 penetrates the tear due to lack of support. When the object moves to the first detection mechanism 2, it contacts the corresponding pulley 24 below, and pressure is applied to the pulley 24. This pressure is transmitted to the corresponding pressure sensor 26 below via the support rod 22 and support rod base 25. The pressure sensor 26 transmits a signal to the transmitter 45 and the controller 6. After receiving the signal from the pressure sensor 26, the controller 6 starts the servo motor 47. The rotation of the servo motor 47 causes the lead screw sleeve 44 to move along the lead screw. As rod 42 moves, the lead screw sleeve 44 moves, simultaneously driving transmitter 45 and receiver 46 to move together. They eventually stop when the distance between the transmitter 45 and the corresponding pressure sensor 26 and the side of the tape machine 1 is equal. This allows for photoelectric sensing of the corresponding position on the tape machine 1. The tape machine 1 first passes through cleaning mechanism 3 to clean its surface, preventing dirt from affecting subsequent tear detection. When the tear position on the tape machine 1 moves to the second detection mechanism 4, the beam emitted by receiver 46 is reflected by reflector 49, and receiver 46 receives the signal from transmitter 45. This signal is then sequentially transmitted to detection circuit 5 and controller 6. Upon receiving the signal from detection circuit 5, controller 6 stops the tape machine 1 and activates alarm 48. The position on the tape machine 1 below transmitter 45 is the tear point.

[0035] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for detecting tearing in a conveyor belt, characterized in that: The tape conveyor tear detection device used includes a tape machine (1), and a first detection mechanism (2) is provided between the upward tape and the return tape of the tape machine (1). The first detection mechanism (2) includes a first fixed frame (21), and multiple support components are provided on the first fixed frame (21). Pressure sensors (26) are respectively provided at the bottom of the multiple support components. The tape machine (1) is provided with a second detection mechanism (4) above it. The second detection mechanism (4) includes a second fixing frame (41). A photoelectric sensor is provided on the inner side of the second fixing frame (41). The photoelectric sensor includes a transmitter (45) and a receiver (46). The pressure sensor (26) is electrically connected to the transmitter (45). A reciprocating drive assembly is connected to the transmitter (45) and the receiver (46). A reflector (49) is provided inside the tape machine (1). The receiver (46) is provided with a detection circuit (5) on its outside. The two ends of the detection circuit (5) are connected to the receiver (46) and the controller (6) respectively. The controller (6) is electrically connected to the pressure sensor (26) and the control circuit of the conveyor belt (1) respectively. The reciprocating drive assembly includes a lead screw (42) rotatably connected to the inner wall of the second fixed frame (41), a lead screw sleeve (44) sleeved on the lead screw (42), the bottom of the lead screw sleeve (44) being connected to the transmitter (45) and the receiver (46), one end of the lead screw (42) extending outside the second fixed frame (41) and connected to the servo motor (47), the servo motor (47) being fixedly connected to the second fixed frame (41), a guide rod (43) slidably connected to the lead screw sleeve (44) above the lead screw (42), a second fixed frame support plate (411) connected to the bottom of the reflector (49), the servo motor (47) being electrically connected to the controller (6); an alarm (48) is provided on the top of the second fixed frame (41), the alarm (48) being electrically connected to the controller (6); And includes the following steps: S1. When the pressure sensor (26) is subjected to pressure, it transmits the signal to the transmitter (45) and the controller (6). S2. After receiving the signal from the pressure sensor (26), the controller (6) starts the servo motor (47), and drives the lead screw sleeve (44) to move along the lead screw (42) through the servo motor (47). While the lead screw sleeve (44) moves, it drives the transmitter (45) and receiver (46) to move together. Finally, it moves until the distance between the corresponding pressure sensor (26) and the side of the conveyor belt (1) is equal. S3. When the beam emitted by the transmitter (45) is reflected by the reflector (49), the receiver (46) receives the signal from the transmitter (45), and the receiver (46) transmits the signal to the detection circuit (5) and the controller (6) in sequence. S4. After receiving the signal from the detection circuit (5), the controller (6) controls the tape machine (1) to stop running and activates the alarm (48). The position of the tape machine (1) below the screw sleeve (44) is the tear.

2. The method for detecting tearing in a conveyor belt according to claim 1, characterized in that: The support assembly includes a support rod (22) that is slidably connected to the first fixed frame (21). The top of the support rod (22) is provided with a pulley bracket (23), and a pulley (24) is rotatably provided above the pulley bracket (23). The bottom of the support rod (22) is provided with a support rod base (25).

3. The method for detecting tearing in a conveyor belt according to claim 2, characterized in that: A spring (27) is provided between the support rod base (25) and the pressure sensor (26). A guide post (28) and a guide sleeve (29) are sleeved inside the spring (27). One end of the guide post (28) extends into the inside of the guide sleeve (29), and the guide post (28) and the guide sleeve (29) are slidably connected. The bottom of the pressure sensor (26) is connected to a first fixed bracket plate (211).

4. The method for detecting tearing in a conveyor belt according to claim 1, characterized in that: The left end of the tape machine (1) is provided with a cleaning mechanism (3), which includes a scraper (31) and a collection box (32) is provided on the left side of the scraper (31).

5. The method for detecting tearing in a conveyor belt according to claim 1, characterized in that: In S1, there are multiple pressure sensors (26), and the control signals transmitted by the pressure sensors (26) at different locations to the controller (6) are different.

6. The method for detecting tearing in a conveyor belt according to claim 5, characterized in that: In S2, different control signals will cause the servo motor (47) to rotate a different number of revolutions, thereby controlling the movement distance of the lead screw sleeve (44).

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